Foundation
8th August 2025
- 1Combined Mean
Group A has 10 items with mean 50. Group B has 5 items with mean 80. Find the combined mean.
- 2Designing Questionnaires and Surveys
A survey question offers the response options 'Never, Sometimes, Always'. State one improvement that could be made.
- 3Experimental Design
What is meant by a control variable?
- 4Median Quartiles and IQR
For the ordered data 2, 4, 5, 7, 8, 9, 11, 13, 14, find the lower quartile (Q1) and upper quartile (Q3).
- 5Index Numbers
The price of milk was 0.80 pounds in the base year and 0.92 pounds this year. Find the index number for milk this year.
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